The OpenGL Extension Wrangler Library is a simple tool that helps C/C++ developers initialize extensions and write portable applications. GLEW currently supports a variety of operating systems, including Windows, Linux, Darwin, Irix, and Solaris.
FlightGear Flight Simulator: free open-source multiplatform flight sim
Founded in 1997, FlightGear is developed by a worldwide group of volunteers, brought together by a shared ambition to create the most realistic flight simulator possible that is free to use, modify and distribute. FlightGear is used all over the world by desktop flight simulator enthusiasts, for research in universities and for interactive exhibits in museums. FlightGear features more than 400 aircraft, a worldwide scenery database, a multi-player environment, detailed sky modelling, a flexible and open aircraft modelling system, varied networking options, multiple display support, a powerful scripting language and an open architecture. Best of all, being open-source, the simulator is owned by the community and everyone is encouraged to contribute.
3D game engine (more powerful redesign of the Cube engine) and FPS game
The Pure Data (short Pd) project on SourceForge unifies the extensions (or externals) written for the Pure Data Graphical Computer Music System written by Miller Puckette with contributions from many others.
Real-time 3D visualization of space
Celestia is an application for real-time 3D visualization of space, with a detailed model of the solar system, over 100,000 stars, more than 10,000 galaxies, and an extension mechanism for adding more objects.
3D Engine c++
The Irrlicht Engine is an open source high performance realtime 3D engine written and usable in C++. It is completely cross-platform, using D3D, OpenGL and its own software renderers.
K-3D is the free (as in freedom) 3d modeling, animation, and rendering system.
for the latest release see either - https://github.com/OGRECave/ogre - https://bitbucket.org/sinbad/ogre/ An efficient, object-oriented hardware accelerated 3D engine. It abstracts the differences between APIs and platforms and allows scene-oriented coding through an easy to use object model. Adaptable to multiple scene types (indoor, outdoor, whatever)
GtkGLExt is an OpenGL extension to GTK+. It provides additional GDK objects which support OpenGL rendering in GTK+, and GtkWidget API add-ons to make GTK+ widgets OpenGL-capable.
Pixie is a photorealistic renderer that uses a RenderMan-like interface. Features include programmable shading, motion blur, depth of field, raytracing, scan-line rendering, occlusion culling, global illumination, caustics ...
Structure Synth generates 3D structures by specifying a design grammar. Even simple systems may generate surprising and complex structures. Structure Synth offers a graphical environment with multiple tabs, syntax highlighting, and OpenGL preview.
DirectX OpenGL Wrapper emulates API calls thru OpenGL commands and other platform specific commands in order to run DirectX 8 application running on other platform than Windows
CsGL is OpenGL for the .Net Framework, providing support for OpenGL 1.1 - 1.4 and numerous extensions.
3D game engine and multiplayer/singleplayer FPS game
delta3d is a robust simulation platform built using open standards and open source software. It features full toolchain development supporting a wide variety of free and commercial software.
QuteScoop is a platform-independent status indicator for VATSIM. It's available for Windows, Mac and Linux.
Space Invaders OpenGL is a 2D/3D clone of Space Invaders developed with the OpenGL API. The host language is C/C++, and the OS platform Windows. For Windows Vista/Seven, the program must be "Run as administrator". I'll do a fix if I have time. Thanks.
Real-time 3D viewer for LDraw LEGO models with OpenGL acceleration.
LDView is a 3D viewer for LDraw LEGO models with a focus on quality rendering with good performance. It also contains many features geared specifically toward LDraw part authoring.
LDraw™ editor for LEGO® style digital building instructions.
LPub3D is an Open Source WYSIWYG editing application for creating LEGO® style digital building instructions. LPub3D is developed and maintained by Trevor SANDY. It uses the LDraw™ parts library, the most comprehensive library of digital Open Source LEGO® bricks available (www.ldraw.org/ ) and reads the LDraw LDR and MPD model file formats. LPub3D is available for free under the GNU Public License v3 and runs on Windows, Linux and macOS Operating Systems. LPub3D is also available as a Linux 'no-install', multi-platform AppImage. Portions of LPub3D are based on LPUB© 2007-2009 Kevin Clague, LeoCAD© 2018 Leonardo Zide.and additional third party components. LEGO® is a trademark of the LEGO Group of companies which does not sponsor, authorize or endorse this application. LEGO® is a trademark of the LEGO Group of companies which does not sponsor, authorize or endorse this application. © 2015-2018 Trevor SANDY
Crystal Space is an Open Source 3D SDK for Unix, Windows, and MacOS/X. It renders with OpenGL and features GLSL shaders, CG shaders, deferred rendering, dynamic shadows, bullet based physics library, terrain engine, skeleton based animation meshes, exporter for Blender, portals, etc...
LFI Player is a simple yet relatively powerful 3D laser display application written using MS Visual C/C++ and MFC. Object-oriented design provides extensability to the display of multiple laser file format types, and use of a variety of output hardware.
PlaneShift is a persistent fantasy multiplayer Role Playing Game (MMORPG) with good 3D graphics. Create your character and live in an ever-changing world. Join us to make PlaneShift THE choice of free MMORPG.
Ayam is a free 3D modelling environment for the RenderMan interface.
The Mesh Viewer is an easy to use lightweight application for displaying three dimensional models (triangular meshes) from a variety of file formats. It uses OpenGL to render the models.
The Retribution Engine is designed for first person action games on Windows PCs using OpenGL and OpenAL. It is supplied with a wide range of games and levels and includes fully featured level and model editors.